getaddrinfo上的段错误()

Question

我在getaddrinfo调用上遇到了分段错误,无法找出原因.它发生在我的服务器和客户端上.一些代码(服务器端)是 -

class TcpServer {
public:

    TcpServer(int);
    ~TcpServer();

    void launchServer();

    void communicate();

private:
    const char* port;
    int fd;
    int comm_fd;
};

在tcpserver.cpp-

void TcpServer::launchServer() {
    int status;

    struct addrinfo hints;
    struct addrinfo *servinfo;  //will point to the results

    //store the connecting address and size
    struct sockaddr_storage their_addr;
    socklen_t their_addr_size;

    //socket infoS
    memset(&hints, 0, sizeof hints); //make sure the struct is empty
    hints.ai_family = AF_INET;  //local address
    hints.ai_socktype = SOCK_STREAM; //tcp
    hints.ai_flags = AI_PASSIVE;     //use local-host address

    //get server info, put into servinfo
    if ((status = getaddrinfo("127.0.0.1", port, &hints, &servinfo)) != 0) {
        fprintf(stderr, "getaddrinfo error: %s\n", gai_strerror(status));
        exit(1);
    }

在主 -

TcpServer server(4950);
server.launchServer();

在int传递给构造浇铸为const char*端口.

当我运行gdb时,它给了我一个回溯 -

#0  0xb7dca737 in getaddrinfo (name=0x8054824 "127.0.0.1", 
    service=0x1356 <Address 0x1356 out of bounds>, hints=0xbffff20c, 
    pai=0xbffff234) at ../sysdeps/posix/getaddrinfo.c:2080
#1  0x08050f79 in TcpServer::launchServer (this=0xbffff304) at tcpserver.cpp:25
#2  0x0804eae9 in main (argc=1, args=0xbffff3f4) at mainserver.cpp:47

所以"地址0x1356超出界限"让我相信端口出了问题,但我不知道出了什么问题.如果有人能指出错误的话,我将不胜感激.谢谢你的帮助.

Answer 1

getaddrinfo("127.0.0.1", port, &hints, &servinfo)
                          ^

那应该是一个char *.我猜你传递一个整数并强制库访问一个无效的地址.

编辑

根据Blagovest Buyukliev的评论,我相信你在构造函数中做了类似的事情:this->port = (const char*) port.

你需要使用某些东西(snprintf可能？)将该整数转换为a char *.简单的铸造是不行的.